The anatomy of a simulation

Simulations are started from a simulation.Simulation object. All actors that operate within a simulation are instantiated within the

simulation.Simulation constructor, and include:

• Instrument

• Scheduler

• Cluster

• Buffer

• Monitor

Simulation Setup and configuration

Cconfiguration files:

• What is in an observation schedule?

• What does a Workflow look like (future work with CWL)

• How do we specify the cluster format

• Bringing it all together (the config object)

trace_file = ‘sim.trace’ machines = config.process_machine_config(‘cluster_config.json’) observations = config.process_telescope_config(‘observations.csv’)

# Initialise the simultion environment env = simpy.Environment()

# Set up Actors and Resources cluster = Cluster() cluster.add_machines(machines) algorithm = FifoAlgorithm() scheduler = Scheduler(env, algorithm) planner = Planner(env, ‘heft’, ‘cluster_config.json’) buff = Buffer(env)

max_antennas = 36 # ASKAP telescope = Telescope(env, observations, buff, max_arrays, planner)

# Simulation object activates initial actors and starts the simulation monitoring simulation = Simulation(env, telescope, cluster, buff, scheduler, trace_file) simulation.init_process() env.run()

Instrumental Observation Requirements

There are a number of requirements that must be True for an observation to commence on the telescope: